Search Results for author: Xiaowei Zhou

Found 45 papers, 24 papers with code

Edge but not Least: Cross-View Graph Pooling

no code implementations24 Sep 2021 Xiaowei Zhou, Jie Yin, Ivor W. Tsang

Graph neural networks have emerged as a powerful model for graph representation learning to undertake graph-level prediction tasks.

Graph Classification Graph Regression +1

Neural Rays for Occlusion-aware Image-based Rendering

no code implementations28 Jul 2021 YuAn Liu, Sida Peng, Lingjie Liu, Qianqian Wang, Peng Wang, Christian Theobalt, Xiaowei Zhou, Wenping Wang

Experiments demonstrate that NeuRay can quickly generate high-quality novel view images of unseen scenes with little finetuning and can handle complex scenes with severe self-occlusions which previous methods struggle with.

Neural Rendering Novel View Synthesis +1

VS-Net: Voting with Segmentation for Visual Localization

1 code implementation CVPR 2021 Zhaoyang Huang, Han Zhou, Yijin Li, Bangbang Yang, Yan Xu, Xiaowei Zhou, Hujun Bao, Guofeng Zhang, Hongsheng Li

To address this problem, we propose a novel visual localization framework that establishes 2D-to-3D correspondences between the query image and the 3D map with a series of learnable scene-specific landmarks.

Semantic Segmentation Visual Localization

Animatable Neural Radiance Fields for Modeling Dynamic Human Bodies

no code implementations ICCV 2021 Sida Peng, Junting Dong, Qianqian Wang, Shangzhan Zhang, Qing Shuai, Xiaowei Zhou, Hujun Bao

Moreover, the learned blend weight fields can be combined with input skeletal motions to generate new deformation fields to animate the human model.

Reconstructing 3D Human Pose by Watching Humans in the Mirror

1 code implementation CVPR 2021 Qi Fang, Qing Shuai, Junting Dong, Hujun Bao, Xiaowei Zhou

In this paper, we introduce the new task of reconstructing 3D human pose from a single image in which we can see the person and the person's image through a mirror.

3D Pose Estimation

Generative Transition Mechanism to Image-to-Image Translation via Encoded Transformation

no code implementations9 Mar 2021 Yaxin Shi, Xiaowei Zhou, Ping Liu, Ivor Tsang

To benefit the generalization ability of the translation model, we propose transition encoding to facilitate explicit regularization of these two {kinds} of consistencies on unseen transitions.

Image Reconstruction Image-to-Image Translation +1

Human-Understandable Decision Making for Visual Recognition

no code implementations5 Mar 2021 Xiaowei Zhou, Jie Yin, Ivor Tsang, Chen Wang

The widespread use of deep neural networks has achieved substantial success in many tasks.

Decision Making

You Don't Only Look Once: Constructing Spatial-Temporal Memory for Integrated 3D Object Detection and Tracking

no code implementations ICCV 2021 Jiaming Sun, Yiming Xie, Siyu Zhang, Linghao Chen, Guofeng Zhang, Hujun Bao, Xiaowei Zhou

In this work, we propose a novel system for integrated 3D object detection and tracking, which uses a dynamic object occupancy map and previous object states as spatial-temporal memory to assist object detection in future frames.

3D Object Detection Object Proposal Generation

Neural Body: Implicit Neural Representations with Structured Latent Codes for Novel View Synthesis of Dynamic Humans

2 code implementations CVPR 2021 Sida Peng, Yuanqing Zhang, Yinghao Xu, Qianqian Wang, Qing Shuai, Hujun Bao, Xiaowei Zhou

To this end, we propose Neural Body, a new human body representation which assumes that the learned neural representations at different frames share the same set of latent codes anchored to a deformable mesh, so that the observations across frames can be naturally integrated.

Novel View Synthesis Representation Learning

Learning Hybrid Representations for Automatic 3D Vessel Centerline Extraction

no code implementations14 Dec 2020 Jiafa He, Chengwei Pan, Can Yang, Ming Zhang, Yang Wang, Xiaowei Zhou, Yizhou Yu

The main idea is to use CNNs to learn local appearances of vessels in image crops while using another point-cloud network to learn the global geometry of vessels in the entire image.

Representation Learning

Motion Capture from Internet Videos

2 code implementations ECCV 2020 Junting Dong, Qing Shuai, Yuanqing Zhang, Xian Liu, Xiaowei Zhou, Hujun Bao

Therefore, we propose to capture human motion by jointly analyzing these Internet videos instead of using single videos separately.

Motion Capture Pose Estimation

Coherent Reconstruction of Multiple Humans from a Single Image

1 code implementation CVPR 2020 Wen Jiang, Nikos Kolotouros, Georgios Pavlakos, Xiaowei Zhou, Kostas Daniilidis

Our goal is to train a single network that learns to avoid these problems and generate a coherent 3D reconstruction of all the humans in the scene.

3D Pose Estimation 3D Reconstruction +2

Learning Feature Descriptors using Camera Pose Supervision

1 code implementation ECCV 2020 Qianqian Wang, Xiaowei Zhou, Bharath Hariharan, Noah Snavely

Recent research on learned visual descriptors has shown promising improvements in correspondence estimation, a key component of many 3D vision tasks.

Deep Snake for Real-Time Instance Segmentation

1 code implementation CVPR 2020 Sida Peng, Wen Jiang, Huaijin Pi, Xiuli Li, Hujun Bao, Xiaowei Zhou

Based on deep snake, we develop a two-stage pipeline for instance segmentation: initial contour proposal and contour deformation, which can handle errors in object localization.

Object Localization Real-time Instance Segmentation +2

GIFT: Learning Transformation-Invariant Dense Visual Descriptors via Group CNNs

1 code implementation NeurIPS 2019 Yuan Liu, Zehong Shen, Zhixuan Lin, Sida Peng, Hujun Bao, Xiaowei Zhou

Instead of feature pooling, we use group convolutions to exploit underlying structures of the extracted features on the group, resulting in descriptors that are both discriminative and provably invariant to the group of transformations.

Pose Estimation

Latent Adversarial Defence with Boundary-guided Generation

no code implementations16 Jul 2019 Xiaowei Zhou, Ivor W. Tsang, Jie Yin

The proposed LAD method improves the robustness of a DNN model through adversarial training on generated adversarial examples.

Learning Transformation Synchronization

1 code implementation CVPR 2019 Xiangru Huang, Zhenxiao Liang, Xiaowei Zhou, Yao Xie, Leonidas Guibas, Qi-Xing Huang

Our approach alternates between transformation synchronization using weighted relative transformations and predicting new weights of the input relative transformations using a neural network.

PVNet: Pixel-wise Voting Network for 6DoF Pose Estimation

1 code implementation CVPR 2019 Sida Peng, Yu-An Liu, Qi-Xing Huang, Hujun Bao, Xiaowei Zhou

We further create a Truncation LINEMOD dataset to validate the robustness of our approach against truncation.

 Ranked #1 on 6D Pose Estimation using RGB on YCB-Video (Mean AUC metric)

6D Pose Estimation using RGB

Extreme Relative Pose Estimation for RGB-D Scans via Scene Completion

1 code implementation CVPR 2019 Zhenpei Yang, Jeffrey Z. Pan, Linjie Luo, Xiaowei Zhou, Kristen Grauman, Qi-Xing Huang

In particular, instead of only performing scene completion from each individual scan, our approach alternates between relative pose estimation and scene completion.

Pose Estimation

Path-Invariant Map Networks

1 code implementation CVPR 2019 Zaiwei Zhang, Zhenxiao Liang, Lemeng Wu, Xiaowei Zhou, Qi-Xing Huang

Optimizing a network of maps among a collection of objects/domains (or map synchronization) is a central problem across computer vision and many other relevant fields.

3D Semantic Segmentation Scene Segmentation

Learning to Estimate 3D Human Pose and Shape from a Single Color Image

no code implementations CVPR 2018 Georgios Pavlakos, Luyang Zhu, Xiaowei Zhou, Kostas Daniilidis

The proposed approach outperforms previous baselines on this task and offers an attractive solution for direct prediction of 3D shape from a single color image.

Human Motion Capture Using a Drone

1 code implementation17 Apr 2018 Xiaowei Zhou, Sikang Liu, Georgios Pavlakos, Vijay Kumar, Kostas Daniilidis

Current motion capture (MoCap) systems generally require markers and multiple calibrated cameras, which can be used only in constrained environments.

Motion Capture

Multi-Image Semantic Matching by Mining Consistent Features

1 code implementation CVPR 2018 Qianqian Wang, Xiaowei Zhou, Kostas Daniilidis

This work proposes a multi-image matching method to estimate semantic correspondences across multiple images.

Graph Matching

6-DoF Object Pose from Semantic Keypoints

1 code implementation14 Mar 2017 Georgios Pavlakos, Xiaowei Zhou, Aaron Chan, Konstantinos G. Derpanis, Kostas Daniilidis

This paper presents a novel approach to estimating the continuous six degree of freedom (6-DoF) pose (3D translation and rotation) of an object from a single RGB image.

Keypoint Detection Translation

Single Image Pop-Up From Discriminatively Learned Parts

no code implementations ICCV 2015 Menglong Zhu, Xiaowei Zhou, Kostas Daniilidis

We introduce a new approach for estimating a fine grained 3D shape and continuous pose of an object from a single image.

Sparse Representation for 3D Shape Estimation: A Convex Relaxation Approach

no code implementations14 Sep 2015 Xiaowei Zhou, Menglong Zhu, Spyridon Leonardos, Kostas Daniilidis

We investigate the problem of estimating the 3D shape of an object defined by a set of 3D landmarks, given their 2D correspondences in a single image.

Multi-Image Matching via Fast Alternating Minimization

no code implementations ICCV 2015 Xiaowei Zhou, Menglong Zhu, Kostas Daniilidis

In this paper we propose a global optimization-based approach to jointly matching a set of images.

Global Optimization

Pose and Shape Estimation with Discriminatively Learned Parts

no code implementations1 Feb 2015 Menglong Zhu, Xiaowei Zhou, Kostas Daniilidis

We introduce a new approach for estimating the 3D pose and the 3D shape of an object from a single image.

3D Shape Estimation from 2D Landmarks: A Convex Relaxation Approach

no code implementations CVPR 2015 Xiaowei Zhou, Spyridon Leonardos, Xiaoyan Hu, Kostas Daniilidis

We investigate the problem of estimating the 3D shape of an object, given a set of 2D landmarks in a single image.

Low-Rank Modeling and Its Applications in Image Analysis

no code implementations15 Jan 2014 Xiaowei Zhou, Can Yang, Hongyu Zhao, Weichuan Yu

In this paper, we review the recent advance of low-rank modeling, the state-of-the-art algorithms, and related applications in image analysis.

Collaborative Filtering Matrix Completion

Active Contours with Group Similarity

no code implementations CVPR 2013 Xiaowei Zhou, Xiaojie Huang, James S. Duncan, Weichuan Yu

In this paper, we propose to use the group similarity of object shapes in multiple images as a prior to aid segmentation, which can be interpreted as an unsupervised approach of shape prior modeling.

Semantic Segmentation

Moving Object Detection by Detecting Contiguous Outliers in the Low-Rank Representation

no code implementations5 Sep 2011 Xiaowei Zhou, Can Yang, Weichuan Yu

To automate the analysis, object detection without a separate training phase becomes a critical task.

Moving Object Detection

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